221203233212 has 12 divisors (see below), whose sum is σ = 416883016536. Its totient is φ = 102093799920.

The previous prime is 221203233197. The next prime is 221203233247. The reversal of 221203233212 is 212332302122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2126954114 + ... + 2126954217.

It is an arithmetic number, because the mean of its divisors is an integer number (34740251378).

Almost surely, 2^221203233212 is an apocalyptic number.

It is an amenable number.

221203233212 is a deficient number, since it is larger than the sum of its proper divisors (195679783324).

221203233212 is a wasteful number, since it uses less digits than its factorization.

221203233212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4253908348 (or 4253908346 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 221203233212 its reverse (212332302122), we get a palindrome (433535535334).

The spelling of 221203233212 in words is "two hundred twenty-one billion, two hundred three million, two hundred thirty-three thousand, two hundred twelve".